• 펄프종이기술
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• 제40권2호
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• pp.37-42
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• 2008

Defects of corrugated board were limiting factors to the corrugated industry's growth. On-line detecting systems of defects are beneficial to increase profits of the corrugated board companies by reducing base paper consumption, increasing process reliability, and increasing productivity. By replacing naked eye inspection of defects to a defects detecting system, continuous inspection without fatigue may guarantee final products quality. The system was developed, which was consisted of line scan CCD camera, lens, illuminating parts, high speed image processor, software, various input parts, and output parts. First installation location of the system was at before fluting process after base paper unwinding, and surface of liner board was inspected by the system. Second installation location was after fluting process and combining process for liner board. Production loss includes ragged appearance of edge, irregular flute shape, wrong combination of flute, score cracking, defects in base paper, and flute cracking. The production loss was analyzed before and after the system installation at a commercial domestic mill. The production loss ratio was defined as a production loss weight per total production weight. The production loss ratio before the installation was decreased a lot from 1.28%(during 3 months before installation) to 0.76%(during 12 months after the first installation) and to 0.25%(during 6 months after the second installation).

• 한국환경농학회지
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• 제37권4호
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• pp.251-259
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• 2018

스마트온실에서 사용하고 있는 다양한 종류의 수경배양액 관리와 관련하여 ICT 기술을 활용한 작물생육 기반 배양액 제어시스템 개발을 위하여, 본 연구에서는 작물 생육단계별 시용배양액의 성분변화를 모니터링하고 이들 실측 데이터를 바탕으로 한 클라우드 기반 데이터 분석시스템을 설계하였다. 수집한 데이터 분석 및 시스템 구축을 위하여 인공광 스마트 온실에서 사용하는 관행의 무기 배양액, 기존 액비 및 폐기 농업부산물 유래 제조액비 등 수종의 배양액을 공시하였으며, 수경재배 작물 생육단계별 시용 배양액내 성분 변화패턴을 모니터링하였다. 발색법에 의한 흡광광도법을 활용하여 $NH_3-N$, $NO_3-N$, $NO_2-N$, $SiO_2$, $PO_4^{3-}$ 및 Cu 등 총 9종의 성분농도 변화를 산출하고 작물의 기초 생육량을 조사하였다. 각 작물의 기초 생육량 데이터는 오픈스택 클라우드 시스템에서 생성된 가상머신(Virtual machine)에 관계형 데이터베이스를 구축하여 수집 항목별로 분류 저장하였다. 저장된 작물별 배양액의 성분변화와 생육량 데이터는 노드제이에스(Node. js) 웹 프레임워크(Framework)를 통해 매주 수집된 데이터를 가시화하여 제공한다. 클라우드 기반 데이터베이스를 구축을 통하여 배양액 성분 실측치 비교와 작물 생육상황은 사용자 스마트 디바이스(Smart devices)를 활용, 작물종과 배양액 성분을 순차적 선택하고, 각 데이터의 비교 및 분석을 시계열 그래프로 실험 결과를 가시화할 수 있도록 하였다. 본 연구에서 개발한 클라우드 기반 데이터 분석시스템 스마트온실내 수경배양액 성분변화 및 재배 작물의 생육을 정기적으로 모니터링한 실측치를 기반으로 데이터베이스를 구축한 것으로 시설재배지나 인공광 스마트온실 등 다양한 농업현장에서 생육관리를 위하여 활용할 수 있다.

• International Journal of Advanced Culture Technology
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• 제6권2호
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• pp.36-42
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• 2018

The types of sixth industry to aim of boosting agriculture and rural areas and Korea's sixth industrial cases(Local community, production-centric, distribution-centric, dine out-centric, treatment-centric, export-centric) and competitiveness measures through Japan and China. Specifically, the competitiveness through the sixth industrial case is to maximize added value through cooperation between communities and to coexist among local residents. Efforts are needed not only to create jobs for the elderly but also to gain consumer confidence, and various measures should be sought to establish a cooperative system. In addition, as customers ' needs change rapidly in the smart age, the life cycle of goods and services is getting extremely faster. Therefore, the sixth industry is expected to be able to predict changes in customer and market trends quickly and accurately, thus making efforts to bring new products and services to market more necessary and contributing to achieving rural activation.

• 한국지역지리학회지
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• 제19권4호
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• pp.668-682
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• 2013

본 연구는 경제개혁 이후 중국 연변조선족자치주내 조선족 인구감소의 메카니즘과 그 결과가 농촌지역에 미치는 영향 및 지역의 변화를 설명하기 위한 것이다. 중국의 시장경제체제의 도입, 호적제도의 약화 및 한 중 국교수립 이후 이동성향이 높아지고 통혼권과 거주지역이 확산되면서 조선족사회는 출산력수준의 급격한 저하와 젊은 층 및 여성 위주의 인구이동이 지속적으로 진행되었다. 이는 곧바로 농촌인구의 급격한 감소와 고령화로 이어져, 농업의 쇠퇴와 농촌지역의 조선족사회집단 해체, 기능약화, 민족교육의 위축 및 지도력 약화라는 결과를 초래하였다. 감소된 노동력을 보완하기 위한 농업경영상의 변화는 타지역 한족(漢族)농민들로 충당되었고 농업의 한족화 현상과 조선족에 비해 한족 농민들의 경제력 상승추세가 나타나고 있으며, 작물구성의 변화는 전통적 수전농업 체계에서 한전(旱田) 단작영 농체계로 특화되어 가는 경향이고, 노동력 효율적 분배가 가능한 상업적 작물이 인기가 높은 것으로 나타났다. 현재 조선족농업인구는 지속적으로 감소하는 추세이고 변화하고 있는 새로운 농업환경에 적절히 대응하지 못하는 문제들이 존재하며 이는 결국 조선족농촌마을이 소실될 위기에 놓여 있어 파격적인 정책지원 및 농촌개발정책의 수립이 중요하다.

• 한국농공학회논문집
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• 제63권2호
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• pp.75-84
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• 2021

As the weather changes become frequent, weather disasters are increasing, causing more damage to plastic greenhouses. Among the damage caused by various disasters, damage by snow to the greenhouse takes a relatively long time, so if an alarm system is properly prepared, the damage can be reduced. Existing greenhouse design standards and snow warning systems are based on snow depth. However, even in the same depth, the load on the greenhouse varies depending on meteorological characteristics and snow density. Therefore, this study aims to secure the structural safety of greenhouses by developing sensors that can directly measure snow loads, and analysing the warning criteria for load using a stochastic model. Markov chain was applied to estimate the failure probability of various types of greenhouses in various regions, which let users actively cope with heavy snowfall by selecting an appropriate time to respond. Although it was hard to predict the precise snow depth or amounts, it could successfully assess the risk of structures by directly detecting the snow load using the developed sensor.

• 한국농공학회논문집
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• 제47권2호
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• pp.15-21
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• 2005

This study is to trace the change of stream shape using the past series of aerial photographs, and to compare the land use changes of riparian area along the stream. For the Gyeongan national stream, aerial photographs of 1966, 1981 and 2000 were selected and ortho-photographs were made with interior orientation and exterior orientation, respectively. Apparent changes of the stream were found that the consolidated reaches of stream by levee construction became straight together with widening of their stream widths. Especially the stream width of inlet part of Paldang lake widened almost twice because of the rise of water level by dam construction in 1974. The land use of riparian areas of three selected years were classified into six categories (water, forest, agricultural land, urban area, road, sandbar) by digitizing method. The forest and agricultural lands decreased and urban area increased as the stream maintenance had been performed.

• 한국농촌건축학회논문집
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• 제14권1호
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• pp.99-106
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• 2012

Transformation which is the major damage factor of living space in folk village is caused by improvement behaviors reflecting real requirements of residents who are the subjects of life. Such a process changes traditional space structure gradually and lowers preservative value of folk village. Therefore this study examines transformational conditions of living space centering around changes of spatial components and plane forms through literature and field research and analyzes characteristics of transformational phenomenon. This study examined changes of components and transformation of Seongeup folk village. While main room plane was diversified by residents' requirements, it was not harmonized with traditional image of Seongeup folk village. Transformation of living space at Seongeup Folk Village was positive from the side of residents' living requirements, but negative in that it damaged unique identity of folk village. Accordingly, it is thought that deliberation considering residents' living requirements as the field of their life with maintenance of original form for the purpose of preserving folk village and professionals' support and legal study for revision of approval system are continuously required.

• 농촌계획
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• 제9권2호
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• pp.49-55
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• 2003

The purpose of this study is to analyze the impact of land-use and population change in rural area by new expressway. Chungbu expressway constructed in 1987, going through the south area of Kyunggi province from Seoul, was selected as a case expressway, and also 2 cities and 18 subdivisions of county in its surrounding area, as a case study area. To analyze the change characteristics before and after the construction, land-use maps of 1986 and 1996 were collected, including the census data for the years in cities and counties yearbooks. Remote sensing technology was applied to classify the land-use maps with six types of land use. Geographic information system was also used for spatial analysis, such as the land-use and accessibility changes. A 5 km buffer zone from interchange of the expressway showed about two times increase of urbanized built-up area than a 5 km buffer zone from the expressway. Accessibility from Seoul and cities was improved in most areas, which is accessing to Seoul through existing Youngdong expressway. Ten rural areas showed increased population with accessibility of average 52 minutes to Seoul and 19 minutes to cities, while eight areas showed decreased population with average 73 minutes to Seoul and 35 minutes to cities. This shows that the threshold value, which is time distance to Seoul and cities for population increase or decrease, one and half hours, respectively. Urbanized area was increased in most areas, even in population decrease areas, so this indicates that there are thinning rural areas, increasing urbanized area while decreasing population.

• 한국농촌건축학회논문집
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• 제16권4호
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• pp.43-50
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• 2014

Since the introduction of the Departmentalized Classroom System in 2009, schools that operate the system experienced many changes in terms of school management, educational courses, and school environment. In particular, class-based classrooms changed into departmentalized classrooms and staff rooms became teachers' support centers and research rooms to create an environment that is apt for the management of departmentalized classrooms. Students have also come to move from departmentalized classrooms to departmentalized classrooms in which homebases were prepared as a space for students to rest and enjoy a stable school life. As such, homebases as a space for students to enjoy school life are indispensable and are becoming more important for the management of the Departmentalized Classroom System. Thus, it is necessary to investigate in detail the state of the establishment of homebases in schools that operate the system. In line with this, this paper sampled 59 schools that have managed the system as an advanced system for over 2 years and conducted school visits and held interviews to investigate and analyze the placement, function, and scale of homebases as well as to provide basic material on homebases.

• 한국농림기상학회지
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• 제21권3호
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• pp.187-195
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• 2019

기후변화에 따른 환경 스트레스 대응 기술과 영농의사결정 플랫폼 개발을 위해서는 환경 조건에 따른 작물의 반응을 이해하기 위한 시스템 개발이 매우 중요하다. 본 연구는 한국형 SPAR 시스템이 다양한 환경 조건에서 작물 생육 반응을 어떻게 정량화하고, 향후 작물 생육 모형 개발에 어떻게 연계될 수 있는지에 대해 방향을 제시하고자 수행되었다. 한국형 SPAR 시스템은 온도, $CO_2$ 농도 등의 기상요소와 양 수분 관리 등 재배요소를 동시에 정밀 조절할 수 있을 뿐 만 아니라 군락수준에서 광합성 및 호흡 등 작물의 생육 반응을 실시간으로 정량화하기에 최적화되어 있다. 본 시스템을 통해 수집된 군락 광합성 정보는 실제 작물의 환경조건에 따른 생육량 변동을 매우 유의하게 반영하여 향후 작물 생육 모형에 실질적으로 적용 가능한 환경-유전 요인간 특이적 반응 함수 개발에 크게 활용될 것으로 기대된다.